Google faced a big setback Thursday in its attempt to overturn a multibillion-dollar European Union antitrust penalty involving Android after a top court's legal adviser sided with regulators. The European Court of Justice's advocate general,

A top adviser to the EU’s highest court backed the penalty imposed by EU antitrust regulators, in a blow to Google’s yearslong battle against the fine.

Google has abused its market power in Android to promote its advertising business, say the EU Commission, the EU Court and now the Advocate General.